<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="https://cdn.staticfile.org/vue/2.2.2/vue.min.js">
    </script>
</head>
<body>
<div id="app">
    <select name="" id="" v-model="status">
        <option value="10">10</option>
        <option value="20">20</option>
        <option value="30">30</option>
        <option value="40">40</option>
    </select>
    <h1>
        {{status}}
    </h1>
</div>

<script>
    var vm = new Vue({
        el: "#app",
        data: {
            status: 20
        }
    });
</script>
</body>
</html>